The interface barrier in van der Waals heterostructures (vdWHs) determines the charge-transfer efficiency and, thus, affects the performance of electronic devices. In this work, we propose two novel 2H–CrSi2N4 and 1T–CrSi2N4 monolayers that can form Ohmic contact heterostructures with other monolayers, including graphene, Ti2C, NbS2, and Ti3C2, based on first-principle calculations. First, we studied 2H–CrSi2N4 and 1T–CrSi2N4 contact with the widely used graphene, and the calculation results show that these heterostructures can form Ohmic contact with zero potential barriers, a desirable property to achieve high-performance electronic devices. Interestingly, this kind of Ohmic contact can be well maintained under electric fields, indicating a great potential for practical applications. On the other hand, 2H–CrSi2N4 and 1T–CrSi2N4 also form Ohmic-contact heterostructures with the Ti2C, NbS2, and Ti3C2 monolayers via vdW interaction. These interesting phenomena of vdWHs can provide enlightenment for designing high-efficiency electronic devices.
Study DesignTechnical report.ObjectiveEvaluate technical feasibility of extreme lateral interbody fusion (XLIF) at the L5-S1 level and provide an elaborate description of the surgical technique.Summary of Background DataWith the development of surgical techniques, the indications for oblique lumbar interbody fusion (OLIF) surgery have been broadened to the L5/S1 segment. However, this technique also has limitations. Different from OLIF, the L5/S1 segment used to be considered the main contraindication for XLIF. To date, no authors have reported the application of XLIF at the L5/S1 level.MethodsOnly patients whose preoperative lumbar MRI showed the position of the psoas major muscles and blood vessels at the L5/S1 level were similar to those seen at supra-L5 levels were seleted. By folding the operating table, the iliac crest was moved downward to expose the L5/S1 intervertebral space during the operation. The remaining surgical procedures were consistent with routine XLIF surgery.Results8 patients successfully underwent XLIF at the L5/S1 level. The L5/S1 disk spaces were always exposed sufficiently for disk preparation and cage insertion. The post operative radiographs showed a satisfactory L5/S1 reconstruction with good cage position. Only 1 patient (12.5%) felt thigh numbness, and the symptoms gradually resolved after surgery and were no longer present in a month. There were no cases of psoas hematoma, retrograde ejaculation or vascular injury. The postoperative VAS score showed that all the patients achieved satisfactory results.ConclusionsXLIF at L5-S1 is feasible in strictly selected cases after thorough preoperative preparation and careful intraoperative procedures. However, we did not recommend XLIF as a routine surgical option at the L5/S1 level.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.